Three-knife trimming machine



Sept. 20, 1949. c. MOYER THREE-KNIFE TRIMMING MACHINE l0 Sheets-Sheet '1Filed April 29, 1947 Sept. 20, 1949. c. L. MOYER THREE-KNIFE TRIMMINGMACHINE 10 Sheets-Sheet 2 Filed April 29, 1947 Filed April 29, 1947 10Sheets-Sheet 5 Sept. 20, 1949. c. MOYER THREE-KNIFE TRIMMING MACHINE 1OSheets-Sheet 4 Filed April 29, 1947 o a w Al wk x m S i Jr /W 1 1 i I 1I I 1 l 1 I I I I I i c Q 111111111 3 1 I 1 I I 1 I I 1 r 1 1| 3 5 New JC- L. MOYER THREE-KNIFE TRIMMING MACHINE Sept. 20, 1949.

10 Shee ts-Sheet 7 Filed April 29, 1947 .y mrney:

Sept. 20, 1949. c. MOYER 2,482,685

THREE-KNIFE TRIMMING MACHINE Filed April 29, 1947 I 1o Sheets-Sheet sSept. 20, 1-949. c. I... MOYER 2,482,685

THREE-KNIFE TRIMMING MACHINE Filed April 29, 1947 10 Sheets-Sheet 9 I79I 234 &

Sept. 20, 1949..

C.L.MOYER THREE-KNIFE TRIMMING MACHINE Filed April 29, 1947 10Sheets-Sheet 10 1771/.272 to 7": C76zz7-221s 1CM4?@3yev- Patented Sept.20, 1949 2,482,685 THREE-KNIFE TRIMMING MACHINE Charles L. Moyer,Chicago, 111., assignor to C. L.

Moyer Company, Chica of Illinois go, 111., a corporation ApplicationApril 29, 1947, Serial No. 744,665

33 Claims.

This invention relates to improvements in book trimming machines, and ismore particularly concerned with a trimming machine embodying threeknives for trimming the head, foot, and front edges of bound books,catalogs, pamphlets, and the like.

It is an object of the present invention to provide a book trimmingmachine in which untrimmed books are adapted to be automatically conveyed from either a feed hopper or a binding machine into position to betrimmed at the head and foot by means of a pair of knives disposed inspaced parallel relation. In thus trimming the head and foot of books,the trimming knives and the cutting blocks associated therewith areadjustably positioned upon a common knife carrier, and suitable meansare provided for manually adjusting the spacing between said knives toac commodate booksof different heights. After a book has been trimmed atits head and foot, it is moved longitudinally through the machine bymeans of coacting feed rails and friction fingers and then brought torest against retractable stop members which are adjustably positioned inpredetermined spaced relation to a front-edge trimming knife which isalso mounted on the knife carrier. After a book has been trimmed alongits front edge, the retractable stop members are retracted to permit thetrimmed book to be conveyed outwardly from the machine between opposingsets of endless belts disposed to frictionally engage the front and backof the book.

In the use of book trimming machines of the types heretofore provided,it has been diflicult, if not impossible, to maintain a sharp cuttingedge on the trimming knives and to maintain a relatively smooth coactingsurface on the cutting blocks. The present-invention contemplates theprovision of a trimming machine in which the knife carrier and cuttingblocks are mounted on a common frame, the knife carrier being reciprocated along said frame to move the cutting knives into and out ofcontact with the cutting blocks. At the termination of the cuttingstroke, the knife carrier is brought into direct contact with the frameof the machine to insure that the knife edges will not cut into thesurface of the cutting blocks. In the operation of the present trimmingmachine, it has been found that the trimming knives and blocks have amuch longer service life and require fewer adjustments due to the use ofthe frame as a stop in limiting the cutting stroke of the knife carrier.

It is a further object of this invention to proting block is preferablyformed square in cross section to provide four flat surfaces. After acut ting surface has become marred, it is thus possible to rotate thecutting block about its axis to present a smooth, unmarred cuttingsurface to coact with the knife. This invention further contemplates theprovision of an improved mounting for the cutting blocks topermitlateral adjustment of the block and thus present an unmarred' book whilethe third knife is trimming the front I edge of an adjacent book.

This invention embodies other novel features, details of constructionand arrangement of parts which are hereinafter set forth in thespecification and claims, and illustrated in the accompanying drawings,wherein:

Fig. 1 is a side elevational view illustrating a machine embodyingfeatures of this invention.

Fig. 2 is a side elevational view illustrating the opposite side of themachine.

Fig. 3 is a fragmentary detail view.

Fig. 4 is an end View of the machine.

Fig. 5 is a sectional view taken along the line 5-5 of Fig. 2.

Fig. 6 is a diagrammatic plan view illustrating the manner in whichbooks to be trimmed are first trimmed along the head and foot and thentrimmed along the front edge.

Fig; '7 is a'longitudinal sectional view taken along the line 7-1 ofFig. 4.

Fig. 8 is a sectional. view taken along the line 88 of Fig. 2;

Fig. 9 is a sectional view taken along the line 9-9 of Fig. 8.

Fig. 10 is a bottom plan view illustrating a knife carrier and the meansfor adjusting the spacing between a pair of spaced parallel knives.

Fig. 11 is an end view of same.

Fig. 12 is a sectional view taken along the line l2l2 of Fig. 7.

Fig. 13 is a fragmentary longitudinal sectional view illustrating themeans employed for frictionally engaging and feeding books through themachine.

Fig..1=l is a view similar to Fig. 13, showing the feed fingers in theirretracted positions.

Fig. 15 is a fragmentary longitudinal sectional vide a book trimmingmachine in which each cut- View illustrating a retractable stopmechanism employed for holding magazines in position to be trimmed alongtheir front edges.

Fig. 16 is a detail, transverse sectional view taken along the line16-48 of Fig. '7. V

Fig. 17 is a detail, plan view showing the transverse cutting table andthe means employed for adjusting the cutting block mounted thereon. Fig.18 is a front elevational view of same. Fig. 19 is an end elevationalview of same.

Machine base Referring now to the drawings for a better understanding ofthis invention, the book trimming machine is shown as comprising a pairer base frame members 6 and 1 connected in spaced parallel relation bymeans of one or more transverse frame members 8. A flat, horizontallydisposed top plate 9 is bolted to the upper ends of the base framemembers 6 and l to form therewith a Knife carrier mounting A pair offront bearing frames 12-!2 extend rea rwardly in spaced parallelrelation along the top surface of the base i l and are secured theretoby means of bolts or capscrews. A pair of rear bearing frames l3.l 3disposed in spaced parallel relation, are also secured to the top of thebase ll by means of bolts or screws. The rear edges of the front bearingframes l2-I 2 and the front edges of the rear bearing frames 13-13define vertically disposed guide recesses adapted to receive a pair ofguide flanges IL-l4 provided on opposite sides of a knifecarrier 16. Toprovide a relatively strong, rigid upper frame structure, the upper endsof the front bearing frames I2--l2 and rear bearing frames l3l3 aresecured together by means of a cover plate l1 and cap screws [8.

Knife carrier drive A pair of crank shafts l9 and 21, journaled inbearings provided on the base frame members 6 and "i, are each formedwith a pair of similar a crank portions adjacent their outer ends toreceive bearing members 24, the latter being internally threaded toadjustablyreceive and engage the threaded lower ends'of connecting rods22 and 23. The upper ends of the connecting rods 22 and 23 are alsothreaded for adjustable engagement in internally threaded bearingmembers 24 which are formed to receive stud journals 25 provided onopposite sides of the knife carrier [6. The bearing members 2 aresecured against displacement from the stud journals 2 5 and crankportions of the crank shafts l9 and 2i by means of cap screws andwashers. Lock nuts 2 [5 are provided on the connecting rods 22 and 23for locking engagement against the inner ends of the bearingmembers 24.'During downward or cutting stroke'movement of the knife carrier IE, itwill be noted that the knife carrier contacts and is broughtto restagainst stop shoulders S formed on each of the bearing frames l,2l2 andl3--l3, thereby accurately terminating the cutting stroke of the knifecarrier.

The crank shafts l9 and 2| are rotated in timed relation by means of anelectric motor 21 which acts through one or more endless belts 28 todrive a pulley 29 keyed to a drive shaft 30. The drive shaft as isjournaled at its ends in suitable bearings provided on the base framemembers 6 and l, and may also be journaled at its pulley supporting endby a bracket bearing la. A driving pinion 3| is keyed to the drive shaft30, adjacent the inner side of the base frame member I, to drive a pairof driven gears 32 and 33 keyed to the crank shafts I9 and 2|,respectively.

Mounting of head and foot trimming knives The lower side ofthe knifecarrier I6 is accurately machined to provide a smooth, finished surfaceto receive a pair of transversely disposed guide plates 34 and 35 whichare secured in spaced parallel relation by cap screws 35 and have theiropposing side edges tapered inwardly to define, with the finishedunder-surface of the knife carrier, adove-tail groove to receive 'a pairof trans-V versely movable dove-tail carriages 31 and 38. As illustratedin Figs. 7 and 12, the carriages 31 and 38 are movable toward or awayfrom each other by means of two pair of racks 39 and M disposed inspaced parallel relation across the underside of the knife carrier IS.The outer ends of the racks 39 and 4| are secured to their respectivecarriages 31 and 38 by cap screws 40, and the free ends of the racks 39and 4| are engaged by rack gears 62 and 43, respectively. The rack gears42 and 43 are keyed to carriage adjustment shafts 44 and 46,respectively, which are journaled in bearings 4! secured to the bottomside of the knife carrier 16 by cap screws 45. The shafts M and 46project beyond the forward side of the knife carrier [6 and are providedwith cross pins 48 for engagement by a sprocket wrench (not shown)during adjustment of the carriages 31 and 38 transversely along the baseI I The carriages 3'! and 38 are formed with dovetail grooves 31a and38a, respectively, to slidably receive dovetail portions 51 and 52formed on side knife holders 53 and 54, respectively, A pair of guidelinks 56 and 51 are pivotally connected at their one ends to the forwardends of the knife holders 53 and 54, respectively, and are journaled attheir other ends on a guide shaft 58 which is secured at its ends inapertures formed in the front bearing frames l2- l2.

The knife holders 53 and 54 are formed to receive adapters '59 and BI.respectively, the adapters being secured in position upon theirrespective knife holders by'means of keys 60, and cap' screws 62.Cutting knives 63 and 64, of the type adapted for use in trimming thehead and foot of books, are adjustabl'y" secured to the adapters 59 and6t, respectively, by means of cap screws 65 and adjustment screws BBQDuring reciprocable movement: of the knife carrier l6,

it will behoted that 'theknives' 63' and d4 are directed along' anarcuate path due to their connection with theframe members l2- l2through the connectinig'links 5 8 and 51.

Mounting of the transverse trimming knife Referring now moreparticularly to Figs. 7 and 16 in the drawingsfa transverse knife holder61 is formed with 'a dovetail portion 63. for reciprocable. movement ina dovetail groove 69 formed in the underside ofthe guide plate 35. Aguide. link H, is pivotally connected at its one end to. one end of theknife holder. 61, and is pivotally connected at its other endtoa bracketl2secured to a rear bearing frame l 3 An adapter 1.3 is

Cutting tables A pair of cutting blocks I8 and I9 are disposed below theknives B3 and 64, respectively, to coact therewith in trimming the headand foot of books, generally shown in dotted outline at B; and a cuttingblock 8| is positioned below the transverse knife 16 to coact therewithin trimming the front edges of books passing through the machine. Thecutting blocks 18 and I9 are adjustably supported on side cutting tables82 and 83, respectively; While the cutting block 8| is adjustablesupported on a transverse cutting table 84. The cutting blocks I8, 19and 8I are preferably formed square in cross section to provide foursimilar surfaces on each block suitable to coact with its respectiveknife in trimming the edges of a book. As illustrated in Figs. 1'7, 18and 19, each cutting table 82, 83 and 84 is formed with an inclinedsurface 85 to coact with a tapered key 81 for raising or lowering itsrespective cutting block I8, 79 or BI. Each key 81 is adapted to bemoved along its longitudinal axis by means of an adjustment screw 88threaded into the end of its respective cutting table; after which, thecutting block is clamped in adjusted position by means of a clampingplate 89 and screws 9I.

H old-down device Hold-down bars 92, 93 and 94 are mounted on hold-downframes 98, 91 and 93, respectively;

Boole feed mechanism A pair of lower feed racks I03 and I04, formed withteeth I05 along their undersides, are mounted for common reciprocablemovement along the cutting tables 82 and 83, respectively, the uppersurfaces of the feed racks being substantially flush with the uppersurfaces of their respective cutting tables. The feed racks I03 and I04are actuated by a pair of gears I06 and I01, respectively, mounted on across shaft I08 journaled on the front bearing frames I 2I2. The shaftI98 is provided with a relatively long key for engagement in key slotsformed in the axial openings of the gears I08 and III! to permit axialadjustment of the gears along the shaft and to prevent rotationalmovement of the gears relative to the shaft or each other. It will alsobe noted that collars I06a and I'Ia are provided on the hubs of thegears I06 and I0! to hold the latter against axial displacement relativeto their respective cutting tables 82 and 83.

6 .A pluralityiof feed fingers I 09 are journaled on shoulder screwsI09aprovided along a pair of upper feed racks H0 and III .which are"mounted for common reciprocable. movement along rack supportingcarriages H2 and II3, respectively. The rack supporting carriages aresupported in spaced parallel relation upon a feed finger. control shaftII4, a cross bar H6 and tie brackets H5 and ,I I5a,.the tie bracketsbeing secured at their, lower ends ,to the inner opposing sides of thecuttingtables 82 and 83, respectively, by'means of cap screws. r

The upper end of each feed finger I09 is pro- 'vided with a roller II Ijournaled on a shoulder screw Illa. A'pair of finger actuating bars H8and. I I3are mounted above the upper feed racks II 0 and III,respectively, for engagement with ia book, B. Y As illustrated in Figs.7, 12, 13 and '14, the finger actuating bars I I3 and I I9 are suspendedin spaced parallel relation for common swingingmovement from theirrespective rack supporting carriages H2 and H3 by means of connectinglinks I 2| and I22, respectively, and shoulder screws I20. Tensionsprings I23 are connected from the upper end of each finger I09 to itsrespective upper feed rack H0 or III to yieldably resist movement of thefingers out of their book engaging position, responsive to the action oftheir actuating bars H8 and H9.

The front ends of the finger actuating bars I I8 and I I9 are connectedto crank arms I24 and I26, respectively, through connecting links I21.The crank arms are mounted for adjustable movement axially along thefeed finger control shaft H4, but are secured against relative rotational movement by means of a key secured to the shaft for engagement inkey slots formed in the crank arms. An arm I28 is secured to the feedfinger control shaft I'I4 for engagement by a cam arm I3I operativelyconnected for reciprocable movement by a, box cam I32 secured on thecrank shaft I9, as illustrated in Figs. 1 and 3.

A pair of upper rack gears I33 and I34 are keyed to an upper rack driveshaft I36 to mesh 7 with and impart reciprocable movement to the upperfeed racks H0 and I II, respectively. The rack gears I33 and I34 are,however, free to be adjusted axially along the shaft I36 responsive tolateral movement of their respective rack supporting carriages H2 andH3.

Drive for ,book feed mechanrism 30 to drive a crank gear I38 'journaledon the base II, the crank gear being provided with a crank pin I39 toengage one end of a crank arm I. The other end of the crank arm MI isjournaledon a stud I42 provided on a rack driving gear I43 which isjournaled at I44 on a front bearing frame I 2. The'driving gear I mesheswith a drivengear I'46 keyed to the lower rack drive shaft I08. Thedriving gear I43 also meshes with an intermediate gear I41 journaled ona stud shaft I48. The intermediate gear I4; also meshes with a drivengear I49 keyed to the upper rack drive shaft I 38.

Cutting table and book feed adjusting mechanism similar in constructionand operation, only one set I5Ia is hereinafter particularly describedalthough corresponding reference numbers have been applied tocorresponding parts of set I5I.

Referring now to Figs. 7 and 8, the adjustment mechanism I5Ia is shownas comprising three adjustment screws I52a, I'53a and I54a journaled forrotational and non-axial movement in bearing frame members I2 and I3,the inner end of screw I5Ia being engaged in a threaded apertureprovided in the rack supporting carriage H3, and the inner ends ofscrews I53a and IBM being engaged in threaded apertures provided in thecutting table 83. Sprockets I56a, It'la and l58a are keyed to the screwsI52a, I53a and itsa, respectively, to receive an endless chain i59a. Apin I6Ia is provided on the outer end of the adjustment screws forengagement by a socket wrench (not shown) employed to rotate the screwsand thus adjust the spacing between the cutting tables and racksupporting carriages supported thereon.

As illustrated in Fig. '7, a pair of guide plates I62 and IE3, securedin spaced parallel relation upon the upper surface of the table top 9 ofthe base II by means of cap screws I64 are formed with opposingdownwardly diverging side edges to engage the dovetail base portionsEGG-I66 formed on the cutting tables 82 and 83.

Book stop mechanism Referring now to Figs. 1, 5, 7 and 12 in thedrawings, the book stop mechanism is shown as comprising a pair of stopbars I61 and I68 pivotally connected at their ends to the outer ends ofarms IB9-I69a and III--I'1Ia, respectively. The arms It9a and IIla arejournaled at their inner ends on stud shafts I12 and I73, respectively,provided on the cutting tables 82 and 83, respectively; and the armsI99'and I'iI are keyed at their inner ends on a stop control shaft I'Mjournaled in the bearing frames I2-i2. The arms I99 and Ill are movableaxially along the control shaft I'M responsive to lateral movement oftheir respective cutting tabels 82 and 83. A crank arm I19 is keyed tothe shaft I19 for engagement with one end of a connecting link it? whichhas its other end connected to a crank arm H8 keyed to a countershaftI19. The shaft I19 is journaled in bearing frames I3-I3 and has keyedthereto a crank arm I9I which is connected to one end of a cam actuatedarm I82. The lower end of the arm I82 is operatively connected to andactuated by a box cam I39 secured on the crank shaft 2|. The box cam I83is similar in construction and operation to the cam I32 illustrated inFig. 3 in the drawings; and the arm I82 is similar to the arm I 34. Twosets of stop fingers I96 and I81 are provided on and extend upwardlyfrom stop bars I6? and I69 to engage the forward edges of books B as thlatter advance through the machine.

Book feed roll mechanism Referring now to Figs. 1,. 5, 7 and 8, thebook'secured to the shaft I94 to be driven by an endless chain I98 leadingfrom a sprocket I99 secured to the crank shaft I9. A sprocket 29I isalso secured to the roll shaft I89 to act through an endless chain 292to drive a sprocket 293 secured to a shaft 294 of an endless conveyorbelt 286.

As illustrated in Figs. '7 and 8, a pair of auxiliary rolls 29l29l arejournaled on the lower ends of rocker arms 298293 to coact with the feedrolls I88I83 in moving books into the machine for engagement by the bookfeed mechanism. The rocker arms 293-298 are pivotally mountedintermediate their ends at 299 upon studs projecting laterally from theouter sides of the rack supporting carriages H2 and i I3. Tensionsprings 2Ii-2I I are connected to the rack supporting carriages H2 andH3 and to the upper ends of the rocker arms 29B-298 to yieldably resistmovement of the auxiliary rolls fill-Z9? out of engagement with theirrespective feed rolls I98I98.

Book positioning and discharging mechanism Referring now to Figs. 1, 7and 15, the book positioning and discharging mechanism is shown ascomprising a pair of lower feed belts 2 I22I2 arranged in spacedparallel relation upon pulleys 2 I 32 I3 and 2 I l which are secured toshafts file and 2H3 journaled in the bearing frames I;iI3. A pair .ofupper feed belts Ell-2H are positioned above the belts 2 I22I2 to coacttherewith in conveying books from the machine. The upper feed belts aremounted on pulleys ME -2i? and Elfz-EIS secured to shafts H9 and whichare journaled in a frame 22 I.

The ends of the shaft 2 I 9 are also journaled in slide blocks 222-322mounted for vertical adjustment in recesses 223-223 formed in thebearing frames I 3I3. Rear adjustment screws 22l224i i are threadedthrough brackets 22:6226 to engage and adjust the positions of the slideblocks 222- 222; and compression springs E2l-22l are interposed betweenthe bearing frames I3I 3 and the lower ends of the slide blocks to holdthe latter against their respective adjustment screws. Front adjustmentscrews 228-228 are threaded through the frame 22I for engagement againstthe upper edges of the bearing frames i3--I3.

A pair of similar stop bars 229229 are disposed in spaced parallelrelation between the lower feed belts 2I22I2 to carry adjustable stopfingers 2?. I-'2ii which are adjustable longitudinally 7 along theirrespective stop bars by means of slots 232-232 and locking bolts 233233.The stop bars are supported on the outer ends of arms 234- 234 and239-4236 secured to the shafts I19 and 23?, respectively. As illustratedin Figs. 1, '7 and 15, the stop fingers 29 I23I serve to hold a book inposition to be trimmed along its front edge by the knife it.

A sprocket 238 is secured to the shaft 2I5 for engagement by an endlesschain 239 which is driven from a sprocket 25! secured to the crank shaft2 I. During clockwise rotational movement of the crank shaft 25, asillustrated in Fig. 1, it will be noted that the adjacent opposingsurfaces of the belts 2'I22I'2 and 2Il2Il coact to grip and move a bookinto position against the stop members 2 3I-23L Operation In theoperation of the machine thus described, untri-mmed books aretransferred from a feed hopper or binding machine (not shown) onto theconveyor belt 299 for delivery between the lower feed rolls I88I88andauxiliary feed rolls 281- 207. The feed rolls act to move theuntrimmed book along the upper surfaces of the cutting tables 82 and 82and center platform 242 for engagement between the lower feed racks I83and I84 and the lower ends of the feed fingers I89. During forwardmovement of the lower feed racks I83 and I04 and upper feed racks H8 andIII, the lower ends of the fingers I89 are disposed in engagementagainst the upper side of a book by means of the tension springs I23.During rearward movement of the upper and lower feed racks, the fingersI89 are pivoted out of engagement with a book by means of the fingeractuating bars I I8 and I I9.

During forward travel .of untrimmed books, the back edge of each book isbrought into engagement against the stop fingers I86 formed on the stopbars I67 and I68. The stop fingers I88 serve to align the back edge of abook and to hold books against forward movement through the machineduring the trimming operation on the preceding books. The stop bars I 6?and IE8 are moved downwardly by means of the arms I I59I69a and I1 I-I II a. to permit untrimmed books to pass over the stop fingers I 86 andinto aligning engagement against stop fingers I87 which are alsoprovided on the stop bars I61 and I68.

After an untrimmed book has been brought into aligning engagementagainst the stop fingers I81, the knife carrier I6 is moved downwardlyby means of crank shafts I9 and 2| acting through the connecting rods 22and 23. During downward movement of the knife carrier, the hold-downmembers 92 and 93 are moved into contacting engagement with the book;after which, the knives 63 and 64 act to trim the head and foot of thebook.

After trimming the head and foot of a book, the

stop fingers I81 are caused to move downwardly E to permit the book tomove forward between the lower and upper feed belts H2 and 2Il and intoengagement against stop members 23L During downward movement of theknife carrier I8, the knife 18 acts to trim the front edge of the book.During the upward stroke of the knife carrier I8, the stop fingers 23Iare retracted to permit the belts 2 I2 and 2 I I to convey the trimmedbook from the machine.

During each cutting stroke of the knife carrier IS, the knifecarrier isbrought into contacting engagement against the shoulders S formed on theupper edges of the bearing frames I2 and I3. This is an importantfeature of the present invention as the downward cutting stroke alwaysterminates at a predetermined position to insure that the knives $3, 64and It are brought into aligning engagement against the surfaces oftheir respective cutting blocks l8, l9 and 8|. By limiting the downwardcutting stroke .of the cutting head, it has been found that a muchlonger service life is provided for the knives and cutting blocks.

It will further be noted that the machine is adapted for use in trimmingbooks of different heights and widths by merely adjusting the positionsof the carriages 31 and 38, the cutting tables 82 and 83 and the stopfingers 23I. The spacing between the knife holders 53 and 54 is variedby rotating the shafts M and 46. The spacing between the cutting tables82 and 83 is varied by rotational movement of the adjustment screws I53and I54a.' The stop fingers 23I are movable longitudinally along theirstop bars 229 by merely loosening the bolts 233. During reciprocablemovement of-the knife carrier I6, the

knives 63, 64 and T8 are moved along an arcuate path by means of theconnecting links 56, 51 and II.

While this invention has been shown in but one form, it is obvious tothose skilled in the art that it is not so limited but is susceptible ofvarious changes and modifications without departing from the spirit andscope of the claimed invention.

I claim as my invention:

1. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, abutment means providedon said base to be directly engaged by and to limit the downwardmovement of said knife carrier, and actuating means provided on saidbase to reciprocate said knife carrier.

2. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above saidbase, fixed abutment meansprovided on said base to be directly engaged by and to limit thedownward movement of said knife carrier, and actuating means provided onsaid base to reciprocate said knife carrier.

3. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, fixed abutment meansprovided on said base to be directly engaged by and to limit thedownward movement of said knife carrier, and actuating means provided onsaid base to reciprocate said knife carrier, said abutment means beingformed and disposed'to be placed under compression when engaged by saidknife carrier.

4. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, abutment means providedon said base to be directly engaged by and to limit the downwardmovement of said knife carrier, crank means journaled on said base, andconnecting rods engaged to said knife carrier and said crank means.

5. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, abutment means providedon said base to be directly engaged by and to limit the downwardmovement of said knife carrier, crank means journaled on said base, andconnecting rods engaged to said knife carrier and said crank means, andmeans to rotate said crank means.

'6. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, abutment means providedon said base to be directly engaged by and to limit the downwardmovement of said knife carrier, a pair of crank shafts journaled on saidbase, each crank shaft having two crank portions, and a connecting rodengaging each crank portion and the adjacent corner of said knifecarr1er.

'7. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, abutment means providedon said base to be directly engaged by and to limit the downwardmovement of said knife carrier, actuating means provided on said base toreciprocate said knife carrier, and a pair of cutting tables mounted inspaced parallel relation upon said base to receive and support books tobe trimmed.

8. Ina book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, abutment means providedon said base to be directly engaged by and to limit the downwardmovement of said knife carrier, actuating means provided on said base toreciprocate said knife carrier, a pair of knife carriages mounted inspaced parallel relation on the underside of said knife carrier, and apair of cutting tables mounted in spaced parallel relation upon saidbase to receive and support books to be trimmed.

9. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, abutment means providedon said base to be directly engaged by and to limit the downwardmovement of said knife carrier, actuating means provided on said base toreciprocate said knife carrier, a pair of knife carriages adjustablymounted in spaced parallel relation on the underside of said knifecarrier, and a pair of cutting tables adjustably mounted in spacedparallel relation upon said base to receive and support books to betrimmed.

10. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, abutment means provided,on said base to be directly engaged by and to limit the downwardmovement of said knife carrier, actuating means provided on said base toreciprocate said knife carrier, a pair of knife carriages adjustablymounted in spaced parallel relation on the underside of said knifecarrier, a pair of cutting tables adiustably mounted in spaced parallelrelation upon said base to receive and support books to be trimmed, andmeans to vary the spacing between said cutting tables.

11. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, abutment means providedon said base to be directly engaged by and to limit the downwardmovement of said knife carrier, actuating means provided on said base toreciprocate said knife carrier, a' pair of knife carriages adjustablymounted in spaced parallel relation on the underside of said knifecarrier, a pair of cutting tables adjustably mounted in spaced parallelrelation upon said base to receive and support books to be trimmed,means to vary the spacing between said cutting tables, and separatemeans to vary the spacing between said knife carriages.

12. In a book trimminggmachine, a base, a knife carrier mounted forvertical reciprocable movement above said base, a pair of knives mountedin spaced parallel relation on the underside of said knife carrier totrimthe head and foot of books, abutment means provided on said base tobe directly engaged by and to limit the downward movement of said knifecarrier, and actuating means provided onsaid base to reciprocate saidknife carrier.

13. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, a pair of knives mountedin spaced parallel relation on the underside of said knife carrier totrim the head and foot of books,

. a third knife mounted on the underside of said knife carrier to trimthe front edge of books, abutment means provided on said base to; bedirectly engaged by and to limit the downward movement of said knifecarrier, and actuating means provided on said base to reciprocate saidknife carrier.

14. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, a pair of knives mountedin spaced parallel relation on the underside of said knife carrier totrim the head and foot of books, a third knife mounted on the undersideof said knife carrier to trim the front edge of books, abutment meansprovided on said base to be directly engaged by and to limit thedownward movement of said knife carrier, actuating m an; provided onsaid base to reciprocate said knife carrier, a book feed means to movebooks through said machine, and stop means to engage a book to betrimmed by said pair of knives.

15. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, a pair of knives mountedin spaced parallel relation on the underside of said knife carrier totrim the head and foot of books, a third knife mounted on the undersideof said knife carrier to trim the front edge of books, abutment meansprovided on said base to be directly engaged by and to limit thedownward movement of said knife carrier, actuating means provided onsaid base to reciprocate said knife carii, a book feed means to movebooks through machine, stop means to engage a book to be trimmed by saidpair of knives, and another stop means to engage a book to be trimmed bysaid third knife.

16. In a book trimming machine, a base, a knife ier mounted for verticalreciprocable moven "it above said base, a pair of knives mounted inspaced parallel relation on the underside of said knife carrier to trimthe head and foot of books, abutment means provided on said base to bedirectly engaged by and to limit the downward movement of said knifecarrier, actuating means provided on said base to reciprocate said knifecarrier, and means to reciprocate said pair of knives endwise along saidknife carrier responsive to reciprocable movement of the knife carrier.

17. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, a pair of knives mountedin spaced parallel relation on the underside of said knife carrier totrim the head and foot of books, a third knife mounted on the undersideof said knife carrier to trim the front edge of books, abutment meansprovided on said base to be engaged by and to limit the downwardmovement of said knife carrier, actuating means provided on said base toreciprocate said knife carrier, means to reciprocate said pair of knivesendwise along said knife carrier responsive to reciprocable movement ofthe knife carrier, and means to reciprocate said third knife endwisealong said. knife carrier responsive to rcciprocable movement of theknife carrier,

18. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, a pair of knives mountedin spaced parallel relation on the underside of said knife carrier totrim the head and foot of books, a third knife mounted on the undersideof said knife carrier to trim the front edge of books, abutment meansprovided on said base to be engaged. by and to limit the downwardmovement of said knife carrier, actuating means provided on said base toreciprocate said knife carrier, means toreciprocate said pair of knivesendwise along said knife carrier responsive to reciprocable movement ofthe knife carrier, means to reciprocate said third knife endwise alongsaid knife carrier responsive to reciprocable movement of the knifecarrier, a pair of cutting tables mounted in spaced parallel relationupon said base to coact with said pair of knives, and a cutting 13 tablemounted on said base to coact with said third knife.

19. In a book trimming machine, a base, a knife carrier mounted forvertical reciprocable movement above said base, a pair of knives mountedin spaced parallel relation on the under side of said knife carrier totrim the head and foot of books, a third knife mounted on the undersideof said knife carrier to trim the front edge of books, abutment meansprovided on said base to be engaged by and to limit the downwardmovement of said knife carrier, actuating means provided on said base toreciprocate said knife carrier, means to reciprocate said pair of knivesendwise along said knife carrier responsive to reciproeable movement ofthe knife carrier, means to reciprocate said third knife endwise alongsaid knife carrier responsive to reciprocable movement of the knifecarrier, a pair of cutting tables mounted in spaced parallel relationupon said base to coact with said pair of knives, a cutting tablemounted on said base to coact with said third knife, means to adjust thespacing between said pair of knives, and means to adjust the spacingbetween said pair of cutting tables.

20. In a book trimming machine, a' base, feed means to move bookslongitudinally along said base, a knife carrier mounted on said base forvertical reciprocable movement, a pair of knifesupporting holdersadjustably mounted for movethe head and foot of a book, a transverselydis- :2?

posed knife holder mounted on the underside of said knife carrier, andmeans provided on said transversely disposed knife holder to receive andengage a knife to trim the front edge of .a' book.

21. In a book trimming machine, a base, feed means to move bookslongitudinally alongsaidbase, a knife carrier mounted on said base forvertical reciprocable movement, a pair of knife-supporting holdersadjustably mounted for movement transversely along the underside of saidknife carrier, means provided on said pair of knife-supporting holdersto receive and engage knives disposed in spaced parallel relation totrim the head and foot of a book, a transversely disposed knife holdermounted on the underside of said knife K carrier, means provided on saidtransversely disposed knife holder to receive and engage a knife to trimthe front edge of a book, and means to move said pair ofknife-supporting holders transversely relative to said knife carrier.

22. In a book trimming machine, a base, feed means to move bookslongitudinally along said base, a knife carrier mounted on said base forvertical reciprocable movement, a pair of knifesupporting holdersadjustably mounted for movement transversely along the underside of saidknife carrier, means provided on said pair of knife-supporting holdersto receive and engage knives disposed in spaced parallel relation totrim the head and foot of a book, a transversely disposed knife holdermounted on the underside of said knife carrier, means provided on saidtransversely disposed knife holder to receive and engage a knife to trimthe front edge of a book, and stop means to hold a book in position tobe trimmed at its head and foot.

23. In a book trimming machine, 'a base, feed means to move bookslongitudinally along said base, a knife carrier mounted on said base forvertical reciprocable movement, a pair of knife- 14 supporting holdersadjustably mounted for movementtransversely along the underside of saidknife carrier, means provided on said pair of knife-supporting holdersto receive and engage knives disposedin spaced parallel relation to trimthe head and foot of a book, a transversely disposed knife holdermounted on the underside of said knife carrier, means provided on saidtransversely disposed knife holder to receive and engage a knife to trimthe front edge of a book, stop means to hold a book in position to betrimmed at its head and foot, and other stop means to hold a book inposition to be trimmed along its front edge.

24. In a book trimming machine, a base, feed means to move bookslongitudinally along said base, a knife carrier mounted on said base forvertical reciprocable movement, a pair of knifesupp-orting holdersadjustably mounted for movement transversely along the underside of saidknife carrier, means provided on said pair of knife-supporting holdersto receive and engage knives disposed in spaced parallel relation totrim the head and foot of a book, a transversely disposed knife holdermounted on the underside of said knife carrier, means provided on saidtransversely disposed knife holder to receive and engage a knife to trimthe front edge of a book, stop means to hold a book in position to betrimmed at its head and foot, other stop means to hold a book inposition to be trimmed along its front edge, and means to move said pairof knife-supporting holders transversely relative to said knife carrier.

25. In a book trimming machine, a base, feed means to move bookslongitudinally along said base, a knife carrier mounted on said base forvertical reciprocable movement, a pair of knifesupporting holdersadjustably mounted for movement transversely along the underside of saidknife carrier, means provided on said pair of knife-supporting holdersto receive and engage knives disposed in spaced parallel relation totrim the head and foot of a book, a transversely disposed knife holdermounted on the underside of said knife carrier, means provided on saidtransversely disposed knife holder to receive and engage a knife to trimthe front edge of a book, stop means to hold a book in position to betrimmed at its head and foot, other stop means to hold a book inposition to be trimmed along its front edge, and rack andpinion means toindependently move said pair of knife-supporting holders transverselyrelative to said knife carrier.

26. In a book trimming machine, a base, two similar sets of coastingfeed mechanisms disposed in spaced parallel relation to move bookslongitudinally along said base, a knife carrier mounted on said base forvertical reciprocable movement, a pair of knife-supporting holdersadjustably mounted for movement transversely along the underside of saidknife carrier, means provided on said pair of knife-supporting holdersto receive and engage knives disposed in spaced parallel relation totrim the head and foot of a book, a transversely disposed knife holdermounted on the underside of said knife carrier, and means provided onsaid transversely disposed knife holder to receive and engage a knife totrim the front edge of a book.

27. In a book trimming machine, a base, two similar sets of coactingfeed mechanisms disposed in spaced parallelrelation to move bookslongitudinally along said base, a knife carrier mounted on said base forvertical reciprocable movement, a pairofi knife-supporting holders ad'-justably' mounted for' movement transversely along the underside of saidknife carrier, means provided on said'pair of knife-supporting holdersto receive and engage knives disposed in spaced parallel relation totrim the head and foot of a book, a. transversely disposed knife holdermounted on the underside of said knife carrier, means. provided on saidtransversely disposed knife holder'toreceive and engage'a knife to trimthe front edge of a book, means to movesaid pair of knife-supportingholders transversely relative to said knife carrieig'and means to moveeach of the two sets of coacting feed. mechanisms transversely relativeto said base.

28. In a book trimming'machine, a base, two similar sets of coactin feedmechanisms disposed in spaced parallel relation to move bookslongitudinally along said base, a knife carrier mounted on said base forvertical. reciprocable movement, a pair of knife supporting holdersadjustably mounted for movement transversely along the undersideof'said' knife carrier; means provided on said pair of knife-supportingholders to receive and engage knives disposed in spaced parallelrelation to trim" the head and foot of a book, a transversely disposedknife holder mounted on the underside of said knife carrier, meansprovided on said transversely disposed knife holder to receive andengage a knife to trim the front edge of a book, rack and pinion meansto move said pair of knife-supporting holders transversely relative tosaid" knife carrier, and means to move each of the two sets of coactingfeed' mechanisms transversely relative to' said base.

29. In a book trimming machine, a base, two similar sets of coastingfeed mechanisms disposed in spaced parallel relation to move'bookslongitudinally along said base, a knife carrier mounted on said base forvertical reciprocable movement, a pair of knife-supporting holdersadjustably mounted for movement transversely along the underside of saidknife carrier, means provided on said pair'of knife-supporting holdersto receive and engage knives disposed in spaced parallel relation totrim the head and foot of a book, a transversely disposed knife holdermounted on the underside of said knife carrier, means provided on saidtransversely disposed znife holder to receive and engage a knife to trimthe front edge of a book, rack and pinion means to move said pair ofknife-supporting holders transversely relative to said knife carrier,and adjustment screw means to move each of the two sets of coasting feedmechanisms transversely relative to said base.

30. In a book trimming machine, a base, two similar sets of coastingfeed mechanisms disposed in spaced parallel relation to move bookslongitudinally alon said base, a knife carrier mounted on said base forvertical reciprocable movement, a pair of knife-supporting holdersadiustably mounted for movement transversely along the underside of saidknife carrier, means provided on said pair of knife-supporting holdersto receive and engage knives disposed in spaced parallel relation totrim the head and foot of a Ill) book, a transversely disposed knifeholder mounted on the underside of said knife carrier.

31. In a book trimming machine, a base, two similar sets of coactingfeed mechanisms disposed in spaced parallel relation to move bookslongitudinally along said base, a knife carrier mounted on said base forvertical reciprocable movement, a pair of knife-supporting holdersadjustably mounted for movement transversely along the underside of saidknife carrier, means provided on said pair of knife-supporting holdersto receive and engage knives disposed in spaced parallel relation totrim the head and foot of a book, a transversely disposed knife holdermounted on the underside of said knife carrier, and stop means to hold abook in position to be trimmed at its head and foot.

32; In a book trimming machine, a base, two

similar sets of coacting feed mechanisms disposed in spaced parallelrelation to move books longi tudinally along said base, a knife carriermounted on said base for vertical reciprocable movement, a pair ofknife-supporting holders adjustably mounted for movement transverselyalong the underside of said knife carrier, means provided on said pairof knife-supporting holders to receive and engage knives disposed inspaced parallel relation to trim the head'and foot of a book, atransversely disposed knife holder'mounted on the underside of saidknife carrier, stop means to hold a book in position to be'trimmed atits head and foot, and means to move said pair of knife sup portingholders transversely relative to said knife carrier.

33. In a book trimming machine, a base, two similar sets of coactingfeed mechanisms disposed in spaced parallel relation to move bookslongitudinally along said base, a knife carrier mounted on said base forvertical reciprocable movement, a pair of knife-supporting holdersadjustably mounted for movement transversely along the underside of.said knife carrier, means provided on said" pair of knife supportingholders to receive and engage knives disposed in spaced parallelrelation to trim the head and foot of a book, a transversely disposedknife holder mounted on the underside of said knife carrier, stop meansto hold a book in position to be trimmed at its head and foot, means tomove said pair of knifesupport'ing holders transversely relative to saidknife carrier, and means to move each of the two sets of coacting feedmechanisms transversely relative to said base.

CHARLES L. MOYER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

